Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana

Euphytica ◽  
2013 ◽  
Vol 194 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Elizabeth Yaa Parkes ◽  
Martin Fregene ◽  
Alfred Dixon ◽  
Bright Boakye-Peprah ◽  
Maryke Tine Labuschagne
Keyword(s):  
Combining Ability ◽  
Bacterial Blight ◽  
Mosaic Disease ◽  
Cassava Mosaic Disease ◽  
Cassava Bacterial Blight ◽  
Ecological Zones

scholarly journals Seasonal Variation on the Incidence and Severity of Major Folia Diseases of Cassava in Sierra Leone

2021 ◽  
Author(s):  
Alusaine Edward Samura ◽  
Sahr N. Fomba ◽  
Augustine Mansarsy ◽  
Musa D. Saffa ◽  
Dan D. Quee ◽  
...  
Keyword(s):  
Sierra Leone ◽  
Rainy Season ◽  
Bacterial Blight ◽  
Dry Season ◽  
Mosaic Disease ◽  
Brown Spot ◽  
Cassava Mosaic Disease ◽  
Seasonal Prevalence ◽  
Cassava Bacterial Blight ◽  
Dry Seasons

A diagnostic survey was conducted in the rainy and dry seasons from 2014 to 2015 to determine the incidence and severity of major diseases of cassava in Sierra Leone. At least three chiefdoms and five villages per district were targeted. The survey was carried out in fourteen districts of the country with geo references using a GPS. On the spot assessment was conducted in all fields. Prevalence, severity and incidence were calculated. The most dominant diseases included the cassava mosaic disease and the cassava bacterial blight. The prevalence of cassava mosaic disease was high with 69.1% and 61.5% in the rainy season and dry season, respectively. The prevalence of cassava bacterial blight was 100% and 92% in the rainy season and dry season, respectively. Diseases of less importance included white spot and brown spot diseases as well as cassava anthracnose disease. The study provides bases for the deployment of improved varieties and provides information on the seasonal prevalence, incidence and severity of cassava diseases in Sierra Leone.

scholarly journals Survey of farmers’ knowledge of cassava mosaic disease and their preferences for cassava cultivars in three agro-ecological zones in Benin

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
Jerome Anani Houngue ◽  
Justin S. Pita ◽  
Gilles Habib Todjro Cacaï ◽  
Martine Zandjanakou-Tachin ◽  
Emmanuel A. E. Abidjo ◽  
...  
Keyword(s):  
Mosaic Disease ◽  
Cassava Mosaic Disease ◽  
Ecological Zones ◽  
Agro Ecological Zones

scholarly journals Farmers’ knowledge, attitudes and practices towards management of cassava pests and diseases in forest transition and Guinea savannah agro-ecological zones of Ghana

2020 ◽  
Vol 4 ◽  
pp. 101
Author(s):  
Benedicta Nsiah Frimpong ◽  
Allen Oppong ◽  
Ruth Prempeh ◽  
Zipporah Appiah-Kubi ◽  
Linda A. Abrokwah ◽  
...  
Keyword(s):  
Management Practices ◽  
Mosaic Disease ◽  
Phenacoccus Manihoti ◽  
Cassava Mosaic Disease ◽  
Mixed Method Research ◽  
Ecological Zones ◽  
Attitudes And Practices ◽  
Pests And Diseases ◽  
Management Actions ◽  
Knowledge Attitudes And Practices

Background: Cassava is a major staple root crop in Ghana, which serves as a food security and an income generating crop for farming families. In spite of its importance, the crop is plagued with biotic factors such as pests and diseases, resulting in yield and income reductions. Methods: Farmers’ knowledge, attitudes and practices towards cassava pest and disease management were investigated. A mixed method research questionnaire was used to collect both qualitative and quantitative data from 94 cassava farm households across two major cassava growing agro-ecologies. Results: Using descriptive statistics, parametric and non-parametric analysis, our study revealed that farmers’ knowledge on cassava pests was high but low for diseases. Whiteflies (Bemisia tabaci Gennadius), grasshoppers (Zonocerus variegatus), aphids (Aphis gossypii Glover), mealybugs (Phenacoccus manihoti), termites (Isoptera), and grasscutters (Thryonomys swinderianus) were perceived as the most common damaging pests. Farmers’ descriptions showed that disease pathogens attacked foliar tissues, stem and root tissues and caused leaf dropping and die back. Cassava mosaic disease and root rot were the most common diseases; however, disease descriptions suggested the incidence of viral, bacterial and fungal diseases. Some of the farmers observed mixed infections on their farms. The results also showed that only 25.5% cultivated improved varieties. Management actions applied included field sanitation practices and pesticide application. The effectiveness level of the control actions was rated moderately effective. Conclusions: The analysis showed heterogeneity in personal and farm level characteristics of respondents across the two agro-ecologies, but agro-ecologies were independent of the management practices employed. There is a need to improve farmers’ access to improved disease-free planting materials through efficient dissemination pathways and increase farmers’ knowledge on cassava pests, diseases and integrated management through publfic awareness creation and capacity building by extension agents and research institutions. Continued government investment is needed to achieve sustainable outcomes.

scholarly journals Farmers’ knowledge, attitudes and practices towards management of cassava pests and diseases in forest transition and Guinea savannah agro-ecological zones of Ghana

2021 ◽  
Vol 4 ◽  
pp. 101
Author(s):  
Benedicta Nsiah Frimpong ◽  
Allen Oppong ◽  
Ruth Prempeh ◽  
Zipporah Appiah-Kubi ◽  
Linda A. Abrokwah ◽  
...  
Keyword(s):  
Management Practices ◽  
Aphis Gossypii ◽  
Mosaic Disease ◽  
Phenacoccus Manihoti ◽  
Cassava Mosaic Disease ◽  
Ecological Zones ◽  
Attitudes And Practices ◽  
Pests And Diseases ◽  
Management Actions ◽  
Knowledge Attitudes And Practices

Background: Cassava is a major staple root crop in Ghana, which serves as a food security and an income generating crop for farming families. In spite of its importance, the crop is plagued with biotic factors such as pests and diseases, resulting in yield and income reductions. Methods: Farmers’ knowledge, attitudes and practices towards cassava pest and disease management were investigated. A mixed research questionnaire was used to collect both qualitative and quantitative data from 94 cassava farm households across two major cassava growing agro-ecologies. Results: Using descriptive statistics, parametric and non-parametric analysis, our study revealed that farmers’ knowledge on cassava pests was high but low for diseases. Whiteflies (Bemisia tabaci Gennadius), grasshoppers (Zonocerus variegatus), aphids (Aphis gossypii Glover), mealybugs (Phenacoccus manihoti), termites (Isoptera), and grasscutters (Thryonomys swinderianus) were perceived as the most common damaging pests. Farmers’ descriptions showed that disease pathogens attacked foliar tissues, stem and root tissues and caused leaf dropping and die back. Cassava mosaic disease and root rot were the most common diseases; however, disease descriptions suggested the incidence of viral, bacterial and fungal diseases. Some of the farmers observed mixed symptoms on their farms. The results also showed that only 25.5% cultivated improved varieties. Management actions applied included field sanitation practices and pesticide application. The effectiveness level of the control actions was rated moderately effective. Conclusions: The analysis showed heterogeneity in personal and farm level characteristics of respondents across the two agro-ecologies, but agro-ecologies were independent of the management practices employed. There is a need to improve farmers’ access to improved disease-free planting materials through efficient dissemination pathways and increase farmers’ knowledge on cassava pests, diseases and integrated management through publfic awareness creation and capacity building by extension agents and research institutions. Continued government investment is needed to achieve sustainable outcomes.

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